Mahufacttrbihg compact



lllhlliThlilU rerun J. sneer/t, or; MGNACA nni'enrs, rnnnsymreme, nssionon 'ro COLONA MANUFACTURING COMPANY, neuron or Pnnnsrmvnnm.

OF PITTSBURGH, PENNSYLVANIA, A. (103E0- DIES.

issueoi Specification of Letters Patent.

Patented Nov, tutti.

Application filed August 20, 1918. Serial. No. 250,713.

nular thread protector blank between suite able receiving cavities in each die, whereby to swage over one terminal end portion of the blank into rounded holding engagement with an inserted retaining abutment rin The dies are illustrated in the accompanybeing, swaged in the dies, and

frame of the press, upon the hose or iug drawing in Which,-

Figure 1 shows a portion of a press provided with the stationary and movable dies, with the blank to be acted upon position, in section;

2 is a similar View showing the dies in active ope 'ation;

Fig. 3 is an enlarged sectional detail view showing the dies at the commencement of the swaging operation;

Fig. at is an enlarged transverse sectional view of one of, the protectors before being subjected to'the swuging action; and

Fig, 5 shows the finished protector. after as applied to the threaded end eta; pipe.

In the drawing, 2 represents the main anvil portion 3 of which is mounted the lower stationary die l. The coneting upper die 5 is mounted in the reciprocahle power actiuited head lot the press nnd'is capable of being lowered upon the blank and die Willilfifitiessary pressure ainlraised herel'roni by hydruulic cylinder or other mechanism, as will be readily understood.

ZDie l is'provided u'itlran annular recessed. cavlty adapted to receive one end of the blank end is so shaped as to fixedly retain the blank and its inserted abutment ring 8 in central position and to sivege the end portion (if the blank inwardly around and over the retaining ring, under pressure, For such purpose, the die 4 is provided With it central lip-standing}; portion defined within the annular shoulder 9 around which the abutment ring 8 snugly its when the blank is lowered into operative position, as in Figs. 1, 2 and 3.

The recessed portion of the die outwardly beyond the central shouldered portion is gradually dished outwardly andji'ipvvardly,

as indicated at 10, beyond a comporatively narrow flat portion 11. The dished portion 10 extends sufficiently far beyond shoulder 9., before terminating at the general level or top surface 12 of the die, to provide sul llcient Width to tended end portion 13 of blank '3' out of its outside diameter,

- Thus a blank ot' the thickness shown in Fig. 3 may be utilized, or the blank may be considerably thicker and of increased enterindependnal diznneter, as indicated in dotted lines at (I. With either size, or any intervening size, the gradually dished annular conceved face 10, under pressure of the upperdie 5, forces the terminal metal portion 13 of the blank.

inwardly around and partially over the retaining ring 8, as indicated. at 1 Fi 5. l

Upper die 5 -'s likewise provided with an annular recess or groove 15 of suitable width and depth to ou age over and around the upper edge of the olank so as to engage and hold it during downward pressure exerting movement of the die," With the dies as thus made, the blank with its in sorted abutment ring 8., preferably snugly inserted upwardly in itsreceiving reamedout cavity against the root of the teeth the pressure of the dies etlects over the metal into tight holding engagement the ring in one operstioin and. resulting in the finished protector. "the snagging operation at the same time: p dunes finished rounded shoulder on on lid of the protector, leaving it without rough edges or parts,

lhe construction and method tion of the dies will be readily u from the foregoing description, an also be understood that dies are to be made in difi'erent sizes to suit different sized pr tectors, the (lies being made in sets which are easily substituted or replaced by other sizesin the some press.

Having described my invention whet Ii claim is:

1. In dies for making at thread protector having an inserted abutment ring and on ere tended outer annular portion at one end;

engage and act upon the era Ill integral swaging die for such portion hav .Ji'ng a oenl-ral annular shoulder for the abutment ring and a surrounding gradually dished or curved swagmg portlon extencung outwardly beyond the annular portlon of the proeector, and a co-acting integral pressure die adapted to engage the opposite end of the blank.

In dies'for making a thread protector having an inserted abutment ring and an ex tended outer annular portion at one end; a

. swaging die for such portion having a central annular shoulder and a surrounding gradually dished or curved swaging portion, and a co-acting pressure die havlng a recessed annular portion adapted to engage the opposite end of the blank.

In testimony whereof I hereunto afilx my signature.

PETER J. SERUM. 

